EP 0074858 A2 19830323 - Radio receiver.
Title (en)
Radio receiver.
Title (de)
Rundfunkempfänger.
Title (fr)
Récepteur radio.
Publication
Application
Priority
GB 8127797 A 19810915
Abstract (en)
A multi-mode radio receiver divides the radio frequency input into two channels and in each channel mixes it with the carrier wave frequency. A quadrature shift in the mixing carrier wave frequencies enables base band signals to be filtered from the mixer outputs. The analogue quadrature signals are converted to digital form and processed digitally to reproduce the original modulating signal for am, fm or pm transmissions. For ssb modulation the mixing frequency is the side band centre frequency instead of carrier frequency.
IPC 1-7
IPC 8 full level
H04B 1/26 (2006.01); H03D 1/00 (2006.01); H03D 1/24 (2006.01); H03D 3/00 (2006.01); H03D 5/00 (2006.01); H03D 7/16 (2006.01)
CPC (source: EP US)
H03D 1/00 (2013.01 - EP US); H03D 1/24 (2013.01 - EP US); H03D 3/007 (2013.01 - EP US); H03D 5/00 (2013.01 - EP US); H03D 3/006 (2013.01 - EP US); H03D 7/165 (2013.01 - EP US); H03D 2200/0025 (2013.01 - EP US); H03D 2200/0035 (2013.01 - EP US); H03D 2200/005 (2013.01 - EP US); H03D 2200/0052 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE LI SE
DOCDB simple family (publication)
EP 0074858 A2 19830323; EP 0074858 A3 19840919; EP 0074858 B1 19870708; DE 3276738 D1 19870813; GB 2106734 A 19830413; GB 2106734 B 19860115; JP S58114532 A 19830707; JP S6412128 B2 19890228; US 4470147 A 19840904
DOCDB simple family (application)
EP 82304870 A 19820915; DE 3276738 T 19820915; GB 8127797 A 19810915; JP 15905782 A 19820914; US 41596882 A 19820908